Public domain
Tank armor production. Carnegie-Illinois Steel Corporation. Farrell, Pennsylvania. Rivet holes for the armor plates of military tanks are run on a vertical drill press in an Eastern mill
From the collection of Library of Congress. Free to download, adapt and use — no permission needed.
Credit lineTank armor production. Carnegie-Illinois Steel Corporation. Farrell, Pennsylvania. Rivet holes for the armor plates of military tanks are run on a vertical drill press in an Eastern mill. 1941-01-01. Palmer, Alfred T., United States. Office For Emergency Management. Farm Security Administration/Office of War Information Collection, Library of Congress. Public domain.
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